Summerfest Announces More Than a Dozen More Headliners

Summerfest is still a few weeks away from announcing its side-stage schedules, but in the meantime the festival is continuing to reveal more headliners. In addition to the more than 70 acts the festival revealed last month, today the festival announced more than a dozen more, including alternative rockers Arctic Monkeys and Phantogram, rockers Rick Springfield and John Hiatt and a pack of Rhymesayers rappers.